Overlapped windows or controls are processed.

Nobody has claimed this yet.

First of all, thank you for this great library.

Now to the issue.
~~When two controls overlap, e.g. an expanded combobox overlaps other controls with its panel.
Now I select an element from the ComboBox.
By clicking, the underlying control automatically receives the focus and is processed accordingly.
A button is clicked unintentionally. A checkbox is activated/deactivated.~~
The same happens when two windows overlap and the Close button of both windows are on top of each other.
If I press the Close button there, both windows may be closed.
Depending on which window is processed first.

Is there a solution for this?

The issue names no source files, tests, or entry points. Reproduce the problem with overlapping controls and windows, then trace how clicks and focus are processed to identify why both underlying elements receive the event. Done means only the topmost control or window responds to a click.

Written by the indexing model from the issue text.